gullarm

The reason I would like to know is that I have a 36v 350W controller driving a hall effect front wheel with 2 x 8000ah 18v Lipos in series. If I add another 18volt lipo this will give me 54 volts - surely too much? So if I acquire a 48volt controller and another 18v lipo and then over volt to 54 would this be ok? I just need a bit more speed I'm topping out at 15mph on the canal tow path, I could just do with nudging 20mph. I have soldered the shunt a bit to give me a some more oomph. The speed limit wires that come out of the controller are not connected, so that cant be affecting the speed. http://www.ebay.co.uk/itm/36V-250W-6Mosfets-E-Bike-Motor-Controller-with-LED-meter-/131305676205?pt=UK_Bikes_GL&hash=item1e926d9dad&nma=true&si=uZNjLKFhuGdN9a9b2ziWVeFUtAA%253D&orig_cvip=true&rt=nc&_trksid=p2047675.l2557

Is it better to have multiple battery's or keep the number to a minimum. The reason I ask is I'm looking at building my battery pack for my bike and after seeing the multiple configuration options that can be made ( price very similar ) For example 2 x 18.5V 8000maH - wired in series or 4 x 18.5v 4000maH - wired in parallel and series

BMS battery's seem pretty good but the postage is high and the possible dreaded import tax and nice post office fee puts me off a bit. The idea of building my own pack is appealing but how would you charge up 2 or even 4 lipos at the same time? Would you need to charge each pack on its on which is a pain,I just want to plug it in, turn it on then walk away. Can you bulk charge them as you would a normal battery. This is all so confusing.

I'm trying to buy a battery for my ebike kit, I'm currently running a 250/350w front hub motor off 6 x 12V 2.8ah SLA battery's. So 36v 5.6ah. Needless to say its a bit of a dullard. I haven't been any were yet, just up and down the road. My normal commute is 5.2 miles - 10.4 return. Up and down the road Feels slow to be honest! Is this because it's limited by the max current output of the batts? I have a pretty much unlimited supply of these batts but the weight is proving too much, I'm carrying the 6 in a backpack. Maybe a rack and more batts? I'm struggling to buy a decent battery pack can anyone point me in the right direction, £200 quid is my limit really.

Its definitely the thumb throttle. Shorted out the wires and it worked. The wires out of the control box are red - green - black The thumb throttle matching wires are orange(y) - blue - white So may be a crossed wire in the connector block. At least I know the speed controller hasn't gone pop. Can get it all back on the bike now and rig up an on/off switch, just need to sort out the front disc brakes which don't match. I have a 180mm rotor on the front and the kit came with a 160mm but the mounting bolts are 90mm apart and I cant find a rotor with this type of 90mm mounting configuration. And its a few mm off ( few washers to pad out the disc will sort that ) My Bike : - http://www.halfords.com/cycling/bikes/mountain-bikes/carrera-kraken-mountain-bike-2011-2012-large-20

The voltage between the red and black throttle wires on the controller. 4.61V Plug in the throttle and measure them again while plugged. 3.61V With the throttle still plugged in, measure between the black and third wire. 0.88V Hold the throttle fully open and measure the voltage between those wires again. 0.88V - no change From this I deduce the speed controller is goosed - the strange thing is when I plugged in the cable for the speed controller whilst everything was powered up the rotor span for about 10 degrees of rotation. I managed to do it once more but that was it. I'm now going to dismantle the thumb throttle and see if anything is amiss inside. Is there anyway of bypassing it or is it a case of a new one. I was hoping to be cruising to work tomorrow.

The voltage between the red and black throttle wires on the controller. 4.61V Plug in the throttle and measure them again while plugged. 3.61V With the throttle still plugged in, measure between the black and third wire. 0.88V Hold the throttle fully open and measure the voltage between those wires again. 0.88V - no change From this I deduce the speed controller is goosed - the strange thing is when I plugged in the cable for the speed controller whilst everything was powered up the rotor span for about 10 degrees of rotation. I managed to do it once more but that was it. I'm now going to dismantle the thumb throttle and see if anything is amiss inside. Is there anyway of bypassing it or is it a case of a new one. I was hoping to be cruising to work tomorrow.

Hi been hovering on here for a few months and finally decided to get my bike sorted. Bought a kit off eBay -http://www.ebay.co.uk/itm/161432911474?_trksid=p2060778.m2749.l2649&var=460473598230&ssPageName=STRK:MEBIDX:IT I can't for the life of me get it working. The only things I can think of are : - I'm using quite a low Ah batterys 3 x 12 volt 2.8Ah - just to get me going and make sure it all works! I have another bank too make a total 36V 5.6Ah but the other bank needs wiring up. When I measure across the thumb throttle it measures 2.5Volts when I turn on the power switch. Now I have read that if the controller detects too high a voltage on start up it won't run. Activating the thumb throttle has no effect on the voltage down the control wire. If I measure as resistance across any of the 3 wires they are all open circuit. Also perhaps the speed controller has some kind of interlock, there are a few wires that I don't understand what they do, I think speed control and auto cruise function, and another one I cant figure out. There is another cable that is called the 3 speed cable low/med/high this is not connected to anything? Does it need to be connected. The kit I bought they swapped out the twist throttle for a thumb throttle so they sent me a different speed controller the only markings on it is ELB2014 - after a bit of research I think its a jasontroller ( what ever that is ) - got the info from : -http://www.etotheipiplusone.net/?p=2799 http://www.ebay.co.uk/itm/36V-250W-6Mosfets-E-Bike-Motor-Controller-LED-meter-/131305676205?pt=UK_Bikes_GL&hash=item1e926d9dad I have emailed the seller but really want to get this sorted this weekend so I can go to work on Monday without dying on route.

Hi been hovering on here for a few months and finally decided to get my bike sorted. Bought a kit off eBay -http://www.ebay.co.uk/itm/161432911474?_trksid=p2060778.m2749.l2649&var=460473598230&ssPageName=STRK%3AMEBIDX%3AIT I can't for the life of me get it working. The only things I can think of are : - I'm using quite a low Ah batterys 3 x 12 volt 2.8Ah - just to get me going and make sure it all works! I have another bank too make a total 36V 5.6Ah but the other bank needs wiring up. When I measure across the thumb throttle it measures 2.5Volts when I turn on the power switch. Now I have read that if the controller detects too high a voltage on start up it won't run. Activating the thumb throttle has no effect on the voltage down the control wire. If I measure as resistance across any of the 3 wires they are all open circuit. Also perhaps the speed controller has some kind of interlock, there are a few wires that I don't understand what they do, I think speed control and auto cruise function, and another one I cant figure out. There is another cable that is called the 3 speed cable low/med/high this is not connected to anything? Does it need to be connected. The kit I bought they swapped out the twist throttle for a thumb throttle so they sent me a different speed controller the only markings on it is ELB2014 - after a bit of research I think its a jasontroller ( what ever that is ) - got the info from : -http://www.etotheipiplusone.net/?p=2799 I have emailed the seller but really want to get this sorted this weekend so I can go to work on Monday without dying on route.

Hi been hovering on here for a few months and finally decided to get my bike sorted. Bought a kit off eBay -http://www.ebay.co.uk/itm/161432911474?_trksid=p2060778.m2749.l2649&var=460473598230&ssPageName=STRK%3AMEBIDX%3AIT I can't for the life of me get it working. The only things I can think of are : - I'm using quite a low Ah batterys 3 x 12 volt 2.8Ah - just to get me going and make sure it all works! I have another bank too make a total 36V 5.6Ah but the other bank needs wiring up. When I measure across the thumb throttle it measures 2.5Volts when I turn on the power switch. Now I have read that if the controller detects too high a voltage on start up it won't run. Activating the thumb throttle has no effect on the voltage down the control wire. If I measure as resistance across any of the 3 wires they are all open circuit. Also perhaps the speed controller has some kind of interlock, there are a few wires that I don't understand what they do, I think speed control and auto cruise function, and another one I cant figure out. There is another cable that is called the 3 speed cable low/med/high this is not connected to anything? Does it need to be connected. The kit I bought they swapped out the twist throttle for a thumb throttle so they sent me a different speed controller the only markings on it is ELB2014 - after a bit of research I think its a jasontroller ( what ever that is ) - got the info from : -http://www.etotheipiplusone.net/?p=2799 I have emailed the seller but really want to get this sorted this weekend so I can go to work on Monday without dying on route.